Whitney Houston's daughter Bobbi Kristina Brown, 19, was spotted kissing her adopted son Nick Gordon, 22. "Bobbi was kissing him on the mouth," an onlooker told a celeb website.

"Bobbi was kissing him on the mouth," an onlooker told a celeb website.

Bobbi was Houston's only daughter from her 15-year marriage to singer Bobby Brown. The singer had adopted Nick ten years ago. He lived with Whitney and Bobbi in Atlanta, Georgia. However, he wasn't officially adopted.

Nick Gordon posted this picture with Bobbi Kristina Brown on Twitter.

Houston, who was found dead in the bathroom of her Los Angeles hotel suite, brought Nick home to save him from his own troubled background. "Nick was family, she loved him as much as any mother could love a child," the Sun quoted a source close to the family as saying.

Bobbi Kristina's partying lifestyle wasn't approved by Houston reportedly. Nick, too, had a little troubled way of life. He was charged with gun possession in Roswell, Georgia and was also arrested for possession of alcohol while he was a minor.